Sheet-delivery mechanism for printing machines



- 16 1927. Aug J. w. JAKEMAN SHEET DELIVERY MECHANISM FOR PRINTINGMACHINES Filed ma e. 1926 5- Sheets-Sheet 1 J. W. JAKEMAN SHEET DELIVERYMECHANISM FOR PRINTING MACHINES Aug. 16

Filed May 6. 1926 Sheets-Sheet 2 1,639,184 1927? J. w. JAKEMAN SHEETDELIVERY MECHANISM FOR PRINTING MACHINES Filed May e. 1926 Sheets-Shet 5J. w. JAKEMAN SHEET DELiVERY IXECHANISM FOR PRINTING MACHINES Filed May6. 1926 .5 Sheets-Sheet 4 Aug. 16 I927 .J.w. JAKEMAN SHEET DELIVERYMECHANISM FOR PRINTING MACHINES Filed May 6, 192e s Sheets-She e t 5Patented Aug. 16, 1927..'-

UNITED STATES EN QFFICE.

JOHN WALLACE min m, or ALTBINCEAM, ENGLAND, asstenoa 'ro LINOTYPE am) mLmrrnn, or LONDON, ENGLAND.

SHEET-DELIVERY luwnnrrsu I038 ram'rnw uxcnmns I Application filed 'm 0,1m, Serial in; 101,024, and In Great mm lay 15,1885.

In a well-known type of sheet delivery mechanism applicable to printingmachmes in which the sheet travels in only one direction from thecylinder to the delivery board, the printed sheet is delivered from theimpression cylinder on to endless tapes moving linearly at or about thecircumferential speed of that cylinder, and is thence transferred toother endless so-called carriage tapes carriedupon riage. a

Duringone stroke of the carriage, the

' carriage tapes remain stationary with recarriage at such speed thatthe upper flights the sheet rests, remaln StiltlOIk spect to thevcarriage and on the other stroke they are caused to revolverelativelyto the upon which ary in space.

In some machines, as for example a single revolution machine with thedelivery at t e feed-board end, it is necessary to reverse the directionof travel of the sheet by meansfor example, of a take-ofl' or deliverycylinder, in order that said sheet may be delivered with the printedside upwards.

Hitherto when a tape carriage'delivery has been fitted to such amachine, it has been usual either to provide separate tapes,fnot

attached to the carriage, to carry the sheet back from thetake-ofissglinder or, where a single set of tapes is u to attach one endof the-tapes to the, carriage or to a.rol1 e r mounted on the carriageand the other end to aroller mounted in the frame o fthe machine. I

Both'these arrangements have the disadvantage that some part of thetapes is underneath the cylinders of the machine and therefore in aposition very difficult of access.

The present invention has for its object to overcome. the aforesaiddifiiculties and to that end it consists in a new or improvedconstruction wherein the whole of the ta es are mounted on, and carriedto and fro y, the carriage, so that they. are completely and veryconveniently accessible for renewal or repair.

The tape carriage which is reciprocated a reciprocating carby anyconvenient means, carries, at each end, a transverse shatt which isencircled by endless tapes Other tapes, hereincalled the top tapes areattached at each end to bars extending transversely across the two endsof the carriage.

' Each of these top tapes passes over an u per roller and under a lowerroller rotatab e tary printing.machine'embodying one constructional formof the said invention;

FiguresQ'and 3 are views similar to Figurel but drawn to a smaller scaleand showing the improved delivery mechanism in respectively differentpositions; a

Figure 4 is an isometric perspective view of part of the deliverymechanism'and with the difle'rent parts represented, shown-in the samepositions as those respectivly occupied by them inFigurel, and

Figure 5 is aview showing means for operating the carriage ta es.

Throughout these gures numerals are used to indicate correspondingparts. and arrows. are employed to indicate direct .ons. of motion; InFigure 1, as in Figures 2 and 3, 1 is the impression cylinder, 2 theplate cylinder, and 3 the take-ofl' or delivery cylinder, all of whichmaybe of ordinary construction and operated in. usual manner.

' 4 is the tape carriage which is of the usual rigid rectangularconstruction embodying.

"of the pertinent parts of a lithographic rolike reference two sidemembers which are themselves-- identified by the reference numerals 4,and are rigidly connected together at their rear ends by a bar-4: andnear their front ends by a bar 4", the wholebeing supported on trackrollers 5 adapted to run along track For convenience of description theend of the tape carriage 4 which is at the left-hand side of each of thefigures, is herein termed the rear end as distinguished from theopposite'or right-hand end shown in those figg'ures which latter end isherein termed the shown for the purpose in Figures 1, 2 and 3, consistof front end; similarly the travel of the carriage leftward andrightward of the several figures is hereinafter referred to as theinstroke and out-stroke respectively.

The tape carriage 4 is reciprocated along the" rails 6 by any convenientmeans; those a crank 9 fast to the impression cylinder shaft 10, a rod11 connecting said crank to a lever arm 12 fasten a rock shaft 13 on ornear either end of which is secured a bentarrn 14 pivotally connected toone end of a link'15 whose opposite -end is pivoted to the front endofthe respective side carriage-member 4.

At the front and rear ends of the tape carriage 4 there are pivotallymounted shafts 16 and 17 respectively, the former having tape pulleys 18fast thereon, which are encircled by the endless tapes 19 which alsoencircle and in the example illustrated run directly upon the shaft 17.

20 indicates the before mentioned top tapes of which the rear and frontends are attached to the b21814 and 4 respectively and each of which.passes over an upper rollor 21 and under a lower roller 22. Theserollers 21, 22 rotate about stationary axes,

being pivotally supported on standards 23 rigidly secured to a cross bar24 which itself is rigidly connected to the-before described deliveryway brackets 7.

- top tapes 20 are delivery cylinder The rollers 21, 22 are so locatedthat the above the upper flights of the endless tapes 19 at the rear endof the tape carriage 4 and below them at the front end of the latter.

25 and 26 represent the feed board and de- 27, 28 the sheet grippers '0fthe impression cylinder 1 and 3 respectively, and 29 pulleys or rollersbetween which and the last named cylinder the sheets are carried round,

the said pulleys being so disposed as to en gage only the margins ofsuch sheets.

The tape carriage 4 is preferably provided with a series of catchfingers 30 adjustable along bars 31 extending longitudinally'of the saidcarriage and supported by brackets 32 attached to the transverse. bars4, 4",

these catch fingers when provided, servingfor limiting the movement ofthe sheets X towards the back of the tape carriage; it is,

however, to be noted that the fingers 30 may be dispensed with, as theyare not in- '41 and on dispensable to an eflicient working of the to theframe and on this shaft is also secured a toggle arm 37whichLco-operates with a second toggle arm 38 to retain, under the in-'fluence of a spring 39, the chain stop 35 in its terminal positions,until it is positively moved therefrom, these said positions beingdetermined b two' adjustable stops 40. On

the rocksha t 36 are also secured roller-- carrying arms41, 42 withwhich, at respectively opposite ends of the travel of the carriage 4,engage tumblers 43, 44 respectively. These tumblers arepivotally'mounted on said carriage so that at the commencement of theinward stroke. of the tape carriage 4 which is the phase represented inFigure 5 the tumbler 43 engages the arm carriage, lowers the chain stop35 into engagement the chain 33; and at the commencement chain stop israised out of engagement with the said chain, by a corresponding actionof the tumbler 44 on the arm 42 whereby,

the continued movement of the of the outward stroke the' during thecontinued outward travel of the carriage, the upper flight of thesprocket chain 33'is carried along by and as if in one piece with, thecarriage.

When the tumbler 43 or 44 contacts with the arm 41 or 42 just prior tothe carriage reaching the respective end of its travel, the

said tumbler is depressed against the action of a.- spring 45 whichimmediately thereafter returns it to its normal position against a stop46. I

The operation of the before described arrangement will now. be describedwith particular reference to Figures '1, 2 and 3, wherein sheets X,represented by chaindotted lines, are shown at respectively differentstages'ofdelivery and in which the carriage is represented, in'Figure 1at the extreme end of the in-stroke, in Figure 2 at" the extremeend ofthe out-stroke, and in Figure 3 at midway, or about midway, of its ii-stroke.

"In'saidoperation a sheetX taken from the feed-board 25, by theimpression cylinder 1'ppers 27, is carried between the plate cylinder 2and the impression cylinder 1 until it is seized by'the grippers28 ofthe delivery cylinder 3, the printed sheet there- 29, assistin direction0 the carriage travel 'until, just p i before the end of the insstroke,the tail end after being carried round between the delivery cylinder andpulleys 29 which engage the margins of said sheet. When the de-. liverycylinder grippers 28 are in or about ceeds, the sheet X is laid uponthetop tapes 20, as shown in Figure 3, the margin pulleys in driving saidsheet in the of the sheet leaves the margin pulleys '29 and falls uponthe endless tapes 19.

The tape carriage l then commences its out-stroke, during which thesheet X is automatically transferred from the top tapes 20 to theendless tapes 19, which are then at frest in relation tothe-said-carriage.

The in-stroke of the-tape carriage 4 then commences andduring thisstroke, the endless tapes 19 are caused to revolve, the linear speed oftheir upper flights being approximatelyequal to the linear speed of thecarriage but opposite indirection, so that said upper flightsarestationary or almost stationary relatively to the frame of the machine.

During this stroke, a second sheet X may be deposited on the top tapes20 from the delivery cylinder 3, while, owin to the rotation of theendless tapes 19, t e previous sheet X is being deposited on thedelivery board 26, all as shown in Figure 3.

Having described my invention, I declare that what I 'claim and desire"to secure by Letters Patent is 1. Sheet delivery mechanism for printmmachines, comprising a -reci rocating tape carriage, two sets of tapesbot reciprocating.

with the carriage, one set servin for receiv- 'ing the-printed sheetsand trans erring them to the other set,the tapes of the-latter set beingendless and serving todeposit the sheets on the delivery board, andmeans for rotating the endless tapes during only the inward strokes ofthe carriage.

2. Sheet deliverymechanism according to claim 1, comprising means atrelatively dif-.

ferent ends of the carria e attaching to said carriage the two ends 0each'tapeof one,

set at relatively difl'erent levels, and 'a stationary support overwhich said tape passes at a part intermediate its ends to support it atthe higher level.

3. Sheet delivery machines comprisin carriage, two-sets o tapes bothreciprocating with the carriage, one set serving for receiving theprinted sheets and transferring them to the second set which in turndeposits them on the delivery board, and in whichrnechanism for printinga reciprocating tape each tape of one set is attached to the tapecarriage b its two ends at relatively different leve s, and atrelatively diflerent ends of the carriage and at a part intermediate itsends passes about pulleys rotating about stationary axes andsupportingsaid tape atreceiving the printed sheets and transferring themto the second set which in turn .de-

osits 'them on the delivery board, and in which each tape of one set isattached to the tape carriage by its two ends at relatively difl'erentlevels, and at relatively different 'ends of the carriage characterizedby. the

tapes of the second set being, endless and adapted to be rotated duringonly. the in- Ward stroke of the carriage.

5. In sheet delivery mechanism-for print-' ing machines, thecombinationwith a-reciprocating tape carriage, of two sets of tapes bothreciprocatin with the carria e, the tapes of one set eing endless andhaving an I their upper flights located in 'a given 'pl ane' while thoseof the other set are at their ends I fixedly attached to the tapecarriage at levels respectively above and below the said plane. 6. 'Insheet delivery mechanism for print-- ing machines, the combination witha reciprocating tape carriage, two shafts rotatablein relativelyopposite, ends of the carriage, endless tapes encircling said shafts andretatin'g during only the inward stroke of the tape carriage, bars fastto respectively opposite ends of the carriage, tapes fixedly attached bytheir ends, to the bars, and rollers .rotatable about stationary axesandguiding said tapes at parts intermediate their ends at differentlevelsrespectively above and beits low the plane containing the upper flights:I

of the endless tapes. 1 A 7. In sheet delivery mechanismior printingmachines, the combination ,with a recip-. rocating tape carriage, twoshafts rotatable in relatively opposite. ends of the carriage,

endless tapes encircling said shafts and rotating during only the inwardstroke of the tape carriage, bars fast to respectively oppo- 'siteendsof the carriage, tapes fixedly attached bytheir ends to the bars,rollers rotatable about stationary axes and guiding said tapes at'partsintermediatetheirends atdiflierhtlevels respectively above andbelow'theplane containing the upper flights of the endless tapes, andcatch riage, track rails along which the tape car-' riage is free totravel indifferent directions, mechamsm adapted to reciprocate saidcargers adjustable on the carriage for limiting the riage along thetrack ra11s, two shafts rotat able in relativel opposite ends of thecarriage, tape p111 eys fast on oneof these shafts, endless tapesencircling these rollers and the other of said shafts and rotatingriage, and rollers gniding said tapes at arts intermediate their ends atdiflerent l vels one above and the other below the plane occupiedby theupper flights of the endless tapes.

In testimony whereof I have aflixed my signature hereto.

JOHN WALLACE J AKEMAN.

